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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
21

Definição e aplicação de um sistema fotométrico em H(alfa)

Ducati, Jorge Ricardo January 1978 (has links)
Dois filtros interferenciais, de 208 e 37 A centrados em Hα forma usados para definir um sistema padrão baseado em 168 estrelas brilhantes distribuídas uniformemente pelo hemisfério celeste sul, de tipos espectrais entre B0 e G5 e de classes I a V. / Two Hα-interference filters with half-widht of 208 and 37 A were used to define a standard system of 168 bright stars uniformly distributed in the northern sky, with spectral types from B0 to G5 and classes I to V.

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